CN104416987B - A kind of polyethylene heat-shrinkage film of low thickness - Google Patents

A kind of polyethylene heat-shrinkage film of low thickness Download PDF

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CN104416987B
CN104416987B CN201310385913.5A CN201310385913A CN104416987B CN 104416987 B CN104416987 B CN 104416987B CN 201310385913 A CN201310385913 A CN 201310385913A CN 104416987 B CN104416987 B CN 104416987B
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density polyethylene
metallocene
polyethylene
raw material
hdpe
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CN104416987A (en
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黄镇荣
黄卫东
罗振华
林城
全明德
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DONGGUAN CITY ZHENGXIN PACKING PRODUCTS Co Ltd
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DONGGUAN CITY ZHENGXIN PACKING PRODUCTS Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/552—Fatigue strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention belongs to heat-shrinkable film technology field, be specifically related to the polyethylene heat-shrinkage film of a kind of low thickness, the thickness of described polyethylene heat-shrinkage film is 45 μm 50 μm, including the thin film of three-layer co-extruded bonding, i.e. outer layer, intermediate layer and internal layer；The raw material of outer layer includes that mass ratio is (3 5): (2 3): metallocene PE, Low Density Polyethylene and the high density polyethylene (HDPE) of 2；The raw material in described intermediate layer includes that mass ratio is 8:(1 2): the metallocene PE of (2 3), Low Density Polyethylene and high density polyethylene (HDPE), the raw material of internal layer includes that mass ratio is the metallocene PE of (5 7): 2:1, Low Density Polyethylene and high density polyethylene (HDPE).The present invention, on the basis of keeping the physical and mechanical propertiess such as good percent thermal shrinkage, tearing strength, fracture tensile strength, elongation at break, impact strength, saves material 40 50%, effectively reduces cost.

Description

A kind of polyethylene heat-shrinkage film of low thickness
Technical field
The invention belongs to heat-shrinkable film technology field, be specifically related to the polyethylene heat-shrinkage film of a kind of low thickness.
Background technology
Heat shrink films is mainly used in sale and the transport of various product, and its Main Function is to consolidate, hide and protect product, So heat shrink films must have higher paracentesis resistance, good contractility and shrinkage stress.Initial heat shrink films is with PVC Being main, along with improving constantly heat shrink films performance requirement, PVC heat shrink films gradually decreases, and various polythene PE multilamellar Coextruding pyrocondensation film quickly grows.Polyethylene heat-shrinkage film is a kind of good material of toughness, is widely used in drinks, pop can The one integral piece assembly package of the products such as class, mineral water class, various beverage class, cloth, this product pliability is good, impact resistance, anti tear Property strong, not cracky, not to be afraid of tide, shrinkage factor big.
Along with the development of technology, each enterprise makes every effort to, on the basis of meeting the good physics of heat shrink films, mechanical performance, enter One step reduces thickness and the cost of heat shrink films.
Therefore, a kind of heat shrink films reducing thickness and production cost of proposition is needed badly.
Summary of the invention
It is an object of the invention to provide a kind of physical and mechanical properties and well and the thickness of heat shrink films can be reduced and cost heat is received Contracting film.
The object of the present invention is achieved like this.
The polyethylene heat-shrinkage film of a kind of low thickness, the thickness of described polyethylene heat-shrinkage film is 45 μm-50 μm, described Polyethylene heat-shrinkage film includes the thin film of three-layer co-extruded bonding, i.e. outer layer, intermediate layer and internal layer；
The thickness of described outer layer: the thickness in intermediate layer: the ratio of the thickness of internal layer is 1:(3-5): 1；
The raw material of described outer layer includes that mass ratio is (3-5): (2-3): the metallocene PE of 2, Low Density Polyethylene and High density polyethylene (HDPE)；
The raw material in described intermediate layer includes that mass ratio is 8:(1-2): the metallocene PE of (2-3), Low Density Polyethylene And high density polyethylene (HDPE)；
The raw material of described internal layer includes that mass ratio is the metallocene PE of (5-7): 2:1, Low Density Polyethylene and highly dense Degree polyethylene；
Described metallocene PE include melt index be 0.1-0.3g/10min, density be more than 0.940 g/cm3's PERT tubing level metallocene PE.
PERT tubing level metallocene PE includes a kind of one using special MOLECULE DESIGN and synthesis technique to produce Medium density polyethylene, its employing ethylene and method of octene copolymer, obtain dividing of uniqueness by the quantity and distribution controlling side chain Minor structure, improves the thermostability of polyethylene, thus improves the range of polyethylene.In the molecular backbone of PERT level polyethylene Introducing 20 methyl branches, or 13 ethyl branch in the most every 1000 carbon atoms, the change of its performance is how many and long by side chain Depending on short difference.Copolymerization can make the connection chain between the platelet that its crystal is little increase.Owing to the existence of octene short-chain branch makes PE's Macromole is uncrystallizable in a flat crystal, but is applied in several crystal, defines the connection between crystal, thus Remain the pliability that polyethylene is good, high thermal conductivity and inertia, be allowed to resistance to pressure more preferable simultaneously.Due to the other string of molecular level The brilliant crystal field of force formed can be overlapping, and it can have the carrying out being hindered deformation by crystal interaction force when stretching, thus Improve overall deflection and rigidity, can effectively relax absorption foreign impacts active force due to the amorphous fraction between shish-kebab again so that The toughness of material also can improve, so using after PERT tubing level metallocene PE, thin film stretching, tear, wear The performances such as thorn, compared with other polyethylene film, improve a lot, and its environmental stress resistance, ageing-resistant also increase.
Wherein, described metallocene PE also includes that melt index is 0.3-0.5g/10min, 0.920-0.940g/ cm3 Geomembrane rank metallocene PE or melt index be 0.3-0.8g/10min, density be 0.910-0.940 g/ cm3 One or both of blown film rank metallocene PE.
Geomembrane rank metallocene PE has the following characteristics that aging resistance, uvioresistant, fabulous anti tear, resists and wear Thorn ability, coefficient of friction are big, fragility is low, thermal deformation is little, have good chemical stability, to adapt to ambient temperature range big, resistance to Chemical solution, splendid anti-seepage effect, short construction period, low cost, the nothings such as high/low temperature, resistance to Colophonium, oil and tar, acid and alkali resistance, salt Root system of plant malicious, anti-, resist chemical performance, impermeable effective.
Blown film rank metallocene PE has the following characteristics that (1) molecular separating force is big, thus has high tensile, resists Tearing strength, impact strength；(2) heat sealability is good, and heat seal strength is high；(3) without harmful transparency composition, transparency height, optics Performance is good；(4) without low-molecular-weight, low crystallised component, the most resistance to alkane extracts；(5) low smelling property, wholesomeness are excellent；Proof stress is opened Split；Thin film resistance to blocking is good；Resistance to steaming and decocting, resistance to acupuncture.
On the basis of PERT tubing level metallocene PE, increase geomembrane rank metallocene PE and blown film rank Metallocene PE, improves the processing characteristics of PERT tubing level metallocene PE, improves the toughness of thin film further.
Wherein, described Low Density Polyethylene be melt index be 0.2-0.5g/10min, density is 0.918-0.925g/ cm3Low Density Polyethylene；Described high density polyethylene (HDPE) be melt index be 0.7 below g/10 min, density be 0.95- 0.97g/ cm3High density polyethylene (HDPE).
Wherein, the thickness of described polyethylene heat-shrinkage film is 46 μm-48 μm.
Wherein, the thickness of described polyethylene heat-shrinkage film is for being 45 μm.
Wherein, the raw material of described outer layer includes that mass ratio is the metallocene PE of 4:2:2, Low Density Polyethylene and highly dense Degree polyethylene；The raw material in described intermediate layer includes that mass ratio is the metallocene PE of 8:1.5:2, Low Density Polyethylene and highly dense Degree polyethylene；The raw material of described internal layer includes that mass ratio is that the metallocene PE of 6:2:1, Low Density Polyethylene and high density are poly- Ethylene.
Wherein, the raw material of described outer layer includes that mass ratio is the metallocene PE of 3:2:2, Low Density Polyethylene and highly dense Degree polyethylene；The raw material in described intermediate layer includes that mass ratio is the metallocene PE of 8:2:2.5, Low Density Polyethylene and highly dense Degree polyethylene；The raw material of described internal layer includes that mass ratio is that the metallocene PE of 5:2:1, Low Density Polyethylene and high density are poly- Ethylene.
Wherein, the raw material of described outer layer include mass ratio be the metallocene PE of 4.5:2.5:2, Low Density Polyethylene and High density polyethylene (HDPE)；The raw material in described intermediate layer includes that mass ratio is the metallocene PE of 8:2:3, Low Density Polyethylene and height Density polyethylene；The raw material of described internal layer includes that mass ratio is the metallocene PE of 6:2:1, Low Density Polyethylene and high density Polyethylene.
Wherein, the raw material of described outer layer includes that mass ratio is the metallocene PE of 5:3:2, Low Density Polyethylene and highly dense Degree polyethylene；The raw material in described intermediate layer includes that mass ratio is the metallocene PE of 8:1:3, Low Density Polyethylene and high density Polyethylene；The raw material of described internal layer includes that mass ratio is the metallocene PE of 5:2:1, Low Density Polyethylene and high-density polyethylene Alkene.
Wherein, its preparation method is to be extruded by three-layer co-extruded equipment after each layer raw material mixing and stirring；Described three The draw ratio of the extrusion screw rod of layer coextrusion is 32:1 ~ 36:1, and the chilling temperature of the vane of three-layer co-extruded equipment is 18 DEG C ~ 25 DEG C, make the cooling of polyethylene heat-shrinkage film evenly.
Preferably, described outer layer includes the fluorine-containing polymer processing aids accounting for outer layer gross weight 0.5-2.5%；In described Interbed includes the fluorine-containing polymer processing aids accounting for intermediate layer gross weight 0.5-2.5%；Described internal layer includes accounting for internal layer gross weight The fluorine-containing polymer processing aids of amount 0.5-2.5%.
Preferably, a kind of or the most several during described outer layer includes fire retardant, antioxidant, light stabilizer and antistatic additive Kind；It is a kind of or the most several that described intermediate layer includes in fire retardant, antioxidant, light stabilizer and antistatic additive；Described internal layer A kind of or the most several including in fire retardant, antioxidant, light stabilizer and antistatic additive.Described fire retardant, antioxidant, light are steady Determine agent and antistatic additive is plastic processing usual auxiliaries, can add the most selectively.
The invention have the benefit that the outer layer of the polyethylene heat-shrinkage film of the present invention, the thickness in intermediate layer, internal layer select Property ground use metallocene PE, Low Density Polyethylene and high density polyethylene (HDPE) and mass ratio thereof, keeping good thermal contraction On the basis of the physical and mechanical propertiess such as rate, tearing strength, fracture tensile strength, elongation at break, impact strength, thickness is reduced to 45 μm-50 μm, save material 40-50%, effectively reduce cost；The use of PERT tubing level metallocene PE makes heat The stretching of shrinkable film, tear, the performance such as puncture compared with other polyethylene film, improve a lot, environmental stress resistance, resistance to Aging, chucking power of the present invention is high, deflection is good, puncture resistant, make packaging firmer without broken hole, is beneficial to transport and stacking.
Detailed description of the invention
Below by embodiment, the invention will be further described, but the practical range of the present invention is not limited to this.
Embodiment 1.
The polyethylene heat-shrinkage film of a kind of low thickness, described polyethylene heat-shrinkage film is by outer layer, intermediate layer and internal layer three layers The thin film of co-extrusion bonding is constituted.
Described outer layer uses:
1Kg melt index is 0.3g/10min, density is more than 0.940 g/cm3PERT tubing level metallocene PE,
0.5Kg melt index is 0.3g/10min, density is 0.927 g/cm3Geomembrane rank metallocene PE,
1Kg melt index is 0.25g/10min, density is 0.923 g/cm3Low Density Polyethylene,
1Kg melt index is 0.04g/10min, density is 0.96g/ cm3High density polyethylene (HDPE)；
And the polymer processing aids that 0.04kg Tai Lema board is fluorine-containing.
Described intermediate layer uses:
4Kg melt index 0.14g/10min, 0.943g/ cm3PERT tubing level metallocene PE,
1.5Kg melt index is 0.3g/10min, density is 0.927g/cm3Geomembrane rank metallocene PE,
2.5Kg melt index 0.8g/10min, 0.917g/ cm3Blown film rank metallocene PE,
2Kg melt index is 0.24g/10min, density is 0.925g/cm3Low Density Polyethylene,
2.5Kg melt index is 0.1g/10min, density is 0.95g/ cm3High density polyethylene (HDPE)；
And the polymer processing aids that 0.125kg Tai Lema board is fluorine-containing.
Described internal layer uses:
5Kg melt index 0.14g/10min, 0.943g/ cm3PERT tubing level metallocene PE,
2Kg melt index is 0.25g/10min, density is 0.923 g/cm3Low Density Polyethylene,
1Kg melt index is 0.04g/10min, density is 0.96g/ cm3High density polyethylene (HDPE)；
And the polymer processing aids that 0.04kg Tai Lema board is fluorine-containing.
The above raw material three-layer co-extruded equipment of use is produced according to three layers of 1:4:1, prepares the poly-second of a kind of low thickness Alkene heat shrink films.The draw ratio of the extrusion screw rod of described three-layer co-extruded equipment is 32:1, the cooling of the vane of three-layer co-extruded equipment Temperature is 18 DEG C.
The thickness of the polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares is 45 μm (wherein, outer layer 7.5 μm, centres Layer 30 μm, internal layer 7.5 μm), mist degree 29%, glossiness (45 °) 40%, to fall to marking impact strength 120g, Elmendorf Tear strong Degree (MD/TD) 480/1500 N/cm, fracture tensile strength (MD/TD) 47/50Mpa, elongation at break (MD/TD) 703/ 800%, percent thermal shrinkage (130 DEG C × 20 seconds MD/TD) 71/22%.
The polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares can be used for the carbonic acid drink of 600ml × 24 bottle (PET bottle) The bundling package of material.
Embodiment 2.
The polyethylene heat-shrinkage film of a kind of low thickness, described polyethylene heat-shrinkage film is by outer layer, intermediate layer and internal layer three layers The thin film of co-extrusion bonding is constituted.
Described outer layer uses:
3Kg melt index is 0.3g/10min, density is 0.946g/cm3PERT tubing level metallocene PE,
1Kg melt index 0.9g/10min, 0.921g/ cm3Blown film rank metallocene PE,
2Kg melt index is 0.5g/10min, density is 0.921 g/cm3Low Density Polyethylene,
2Kg melt index is 0.3g/10min, density is 0.96g/ cm3High density polyethylene (HDPE).
Described intermediate layer uses:
10Kg melt index is 0.2g/10min, density is 0.940g/cm3PERT tubing level metallocene PE,
3Kg melt index is 0.3g/10min, 0.925g/ cm3Geomembrane rank metallocene PE,
3Kg melt index 0.9g/10min, 0.921g/ cm3Blown film rank metallocene PE,
3Kg melt index is 0.5g/10min, density is 0.921 g/cm3Low Density Polyethylene,
4Kg melt index is 0.3g/10min, density is 0.96g/ cm3High density polyethylene (HDPE).
Described internal layer uses:
6Kg melt index is 0.3g/10min, density is 0.946g/cm3PERT tubing level metallocene PE,
2Kg melt index is 0.5g/10min, density is 0.921 g/cm3Low Density Polyethylene,
1Kg melt index is 0.3g/10min, density is 0.96g/ cm3High density polyethylene (HDPE).
The above raw material three-layer co-extruded equipment of use is produced according to three layers of 1:3:1 technique, prepares a kind of low thickness Polyethylene heat-shrinkage film.The draw ratio of the extrusion screw rod of three-layer co-extruded equipment is 33:1, the cooling of the vane of three-layer co-extruded equipment Temperature is 19 DEG C.
Thickness 50 μm (wherein, outer layer 10 μm, the intermediate layer 30 of the polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares μm, internal layer 10 μm), mist degree 9%, glossiness (45 °) 60%, fall to marking impact strength 280g, Elmendorf tear strength (MD/ TD) 455/1520 N/cm, fracture tensile strength (MD/TD) 43/47Mpa, elongation at break (MD/TD) 590/810%, heat are received Shrinkage (130 DEG C × 20 seconds MD/TD) 72/21%.
The polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares can be used for 2L × 8 bottle (PET bottle) or 1.25L × 12 The bundling package of the soda pop of bottle.
Embodiment 3.
The polyethylene heat-shrinkage film of a kind of low thickness, described polyethylene heat-shrinkage film is by outer layer, intermediate layer and internal layer three layers The thin film of co-extrusion bonding is constituted.
Described outer layer uses:
3Kg melt index is 0.11g/10min, density is 0.944g/cm3PERT tubing level metallocene PE,
1Kg melt index 1.0g/10min, 0.925g/ cm3Blown film rank metallocene PE,
2Kg melt index is 0.5g/10min, density is 0.922g/cm3Low Density Polyethylene,
2Kg melt index is 0.7g/10min, density is 0.96g/ cm3High density polyethylene (HDPE)；
0.05kg Magnesium Hydroxide Inorganic Flame Retardant.
Described intermediate layer uses:
10Kg melt index is 0.1-0.3g/10min, density is more than 0.940 g/cm3PERT tubing level metallocene Polyethylene,
5Kg melt index is 0.5g/10min, density is 0.944g/cm3Geomembrane rank metallocene PE,
5Kg melt index 1.0g/10min, 0.925g/ cm3Blown film rank metallocene PE,
5Kg melt index is 0.5g/10min, density is 0.922g/cm3Low Density Polyethylene,
7. 5Kg melt index be 0.7g/10min, density be 0.96g/ cm3High density polyethylene (HDPE)；
0.325kg Magnesium Hydroxide Inorganic Flame Retardant.
Described internal layer uses:
3.5Kg melt index is 0.11g/10min, density is 0.944g/cm3PERT tubing level metallocene PE,
1Kg melt index is 0.5g/10min, density is 0.922g/cm3Low Density Polyethylene,
0.5Kg melt index is 0.7g/10min, density is 0.96g/ cm3High density polyethylene (HDPE)；
0.05kg Magnesium Hydroxide Inorganic Flame Retardant.
The above raw material three-layer co-extruded equipment of use is produced according to 1:5:1 technique, prepares the poly-second of a kind of low thickness Alkene heat shrink films.The draw ratio of the extrusion screw rod of three-layer co-extruded equipment is 34:1, the chilling temperature of the vane of three-layer co-extruded equipment It it is 21 DEG C.
Thickness 48 μm (wherein, outer layer 6.9 μm, the intermediate layer of the polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares 34.2 μm, internal layer 6.9 μm), mist degree 10%, glossiness (45 °) 119%, to fall to marking impact strength 140g, Elmendorf Tear strong Degree (MD/TD) 455/1450N/cm, fracture tensile strength (MD/TD) 40/44Mpa, elongation at break (MD/TD) 600/790%, Percent thermal shrinkage (130 DEG C × 20 seconds MD/TD) 72/21%.
The polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares can be used for the collection of the water of 600mL × 24 bottle (PET bottle) Bundle packaging.
Embodiment 4.
The polyethylene heat-shrinkage film of a kind of low thickness, described polyethylene heat-shrinkage film is by outer layer, intermediate layer and internal layer three layers The thin film of co-extrusion bonding is constituted.
Described outer layer uses:
2.5Kg melt index is 0.11g/10min, density is 0.944g/cm3PERT tubing level metallocene PE,
1.5Kg melt index is 0.3g/10min, density is 0.920 g/cm3Low Density Polyethylene,
1Kg melt index is 0.7g/10min, density is 0.95g/ cm3High density polyethylene (HDPE)；
0.075Kg titanium dioxide light stabilizer.
Described intermediate layer uses:
8Kg melt index is 0.11g/10min, density is 0.944g/cm3PERT tubing level metallocene PE,
1Kg melt index is 0.8g/10min, density is 0.918 g/cm3Low Density Polyethylene,
3Kg melt index is 0.7g/10min, density is 0.95g/ cm3High density polyethylene (HDPE)；
0.18Kg titanium dioxide light stabilizer.
Described internal layer uses:
5.5Kg melt index is 0.11g/10min, density is 0.944g/cm3PERT tubing level metallocene PE,
2.2Kg melt index is 0.3g/10min, density is 0.920 g/cm3Low Density Polyethylene,
1.1Kg melt index is 0.7g/10min, density is 0.95g/ cm3High density polyethylene (HDPE)；
0.132Kg titanium dioxide light stabilizer.
The above raw material three-layer co-extruded equipment of use is produced according to 1:5:1 technique, prepares the poly-second of a kind of low thickness Alkene heat shrink films.The draw ratio of the extrusion screw rod of three-layer co-extruded equipment is 35:1, the chilling temperature of the vane of three-layer co-extruded equipment It it is 23 DEG C.
Polyethylene heat-shrinkage film thickness 46 μm (wherein, outer layer 6.5 μm, intermediate layer 33 μ of the low thickness that the present embodiment prepares M, internal layer 6.5 μm), mist degree 29%, glossiness (45 °) 60%, fall to marking impact strength 150g, Elmendorf tear strength (MD/ TD) 520/1580 N/cm, fracture tensile strength (MD/TD) 43/45Mpa, elongation at break (MD/TD) 550/720%, heat are received Shrinkage (130 DEG C × 20 seconds MD/TD) 72/21%.
The polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares can be used for the bundling package of 2L × 8 bottle (PET bottle).
Embodiment 5.
The polyethylene heat-shrinkage film of a kind of low thickness, described polyethylene heat-shrinkage film includes outer layer, intermediate layer and outer layer three The thin film of the extrusion blow-molded bonding of layer is constituted；
Described outer layer uses:
4.5Kg melt index is 0.2g/10min, density is 0.950 g/cm3PERT tubing level metallocene PE,
2.5Kg melt index is 0.3g/10min, density is 0.923g/cm3Low Density Polyethylene,
1.1Kg melt index is 0.5g/10min, density is 0.96g/ cm3High density polyethylene (HDPE)；
Described intermediate layer uses:
12Kg melt index is 0.14g/10min, density is 0.941g/cm3PERT tubing level metallocene PE,
3Kg melt index is 0.3g/10min, density is 0.923g/cm3Low Density Polyethylene
4.5Kg melt index is 0.7g/10min, density is 0.961g/ cm3High density polyethylene (HDPE)；
Described internal layer uses:
3Kg melt index is 0.2g/10min, density is 0.950 g/cm3PERT tubing level metallocene PE,
1Kg melt index is 0.3g/10min, density is 0.923g/cm3Low Density Polyethylene,
0.5Kg melt index is 0.5g/10min, density is 0.96g/ cm3High density polyethylene (HDPE).
The above raw material three-layer co-extruded equipment of use is produced according to 1:3:1 technique, prepares the poly-second of a kind of low thickness Alkene heat shrink films.The draw ratio of the extrusion screw rod of three-layer co-extruded equipment is 36:1, the chilling temperature of the vane of three-layer co-extruded equipment It it is 25 DEG C.
The thickness of the polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares is 50 μm (wherein, outer layer 10 μm, intermediate layers 30 μm, internal layer 10 μm), mist degree 8%, glossiness (45 °) 70%, fall to marking impact strength 300g, Elmendorf tear strength (MD/TD) 455/1450 N/cm, fracture tensile strength (MD/TD) 41/46Mpa, elongation at break (MD/TD) 600/710%, Percent thermal shrinkage (130 DEG C × 20 seconds MD/TD) 69/18%.
The polyethylene heat-shrinkage film of the low thickness that the present embodiment prepares can be used for the bundling package of 2.5L × 6 bottle (PET bottle).
Table 1 is the physical property contrast table of the present invention and ordinary hot shrink film.
Table 1
。
By the contrast of table 1 it can be seen that the thickness of heat shrink films of the present invention subtracts significantly than the thickness of ordinary hot shrink film Few, but percent thermal shrinkage is still suitable with ordinary hot shrink film, tearing strength, fracture tensile strength, elongation at break, impact strength, Glossiness and mist degree are substantially better than ordinary hot shrink film.
The above is only the better embodiment of the present invention, thus all according to the structure described in present patent application scope, The equivalence that feature and principle are done changes or modifies, in the range of being all included in present patent application.

Claims (6)

1. the polyethylene heat-shrinkage film of a low thickness, it is characterised in that: the thickness of described polyethylene heat-shrinkage film is 46 μm-48 μm, described polyethylene heat-shrinkage film includes the thin film of three-layer co-extruded bonding, i.e. outer layer, intermediate layer and internal layer；
The thickness of described outer layer: the thickness in intermediate layer: the ratio of the thickness of internal layer is 1:(3-5): 1；
The raw material of described outer layer includes that mass ratio is (3-5): (2-3): the metallocene PE of 2, Low Density Polyethylene and highly dense Degree polyethylene；
The raw material in described intermediate layer includes that mass ratio is 8:(1-2): the metallocene PE of (2-3), Low Density Polyethylene and height Density polyethylene；
The raw material of described internal layer includes that mass ratio is that the metallocene PE of (5-7): 2:1, Low Density Polyethylene and high density are poly- Ethylene；
Described metallocene PE include melt index be 0.1-0.3g/10min, density be more than 0.940 g/cm3PERT pipe Material level metallocene PE；Described metallocene PE also includes that melt index is 0.3-0.5g/10min, 0.920-0.940g/ cm3Geomembrane rank metallocene PE or melt index be 0.3-0.8g/10min, density be 0.910-0.940 g/ cm3One or both of blown film rank metallocene PE；Described Low Density Polyethylene be melt index be 0.2-0.5g/ 10min, density is 0.918-0.925g/cm3Low Density Polyethylene；Described high density polyethylene (HDPE) be melt index be 0.7 g/ 10 below min, density are 0.95-0.97g/ cm3High density polyethylene (HDPE).
The polyethylene heat-shrinkage film of a kind of low thickness the most according to claim 1, it is characterised in that: the raw material of described outer layer It is the metallocene PE of 4:2:2, Low Density Polyethylene and high density polyethylene (HDPE) including mass ratio；The raw material bag in described intermediate layer Including mass ratio is the metallocene PE of 8:1.5:2, Low Density Polyethylene and high density polyethylene (HDPE)；The raw material of described internal layer includes Mass ratio is the metallocene PE of 6:2:1, Low Density Polyethylene and high density polyethylene (HDPE).
The polyethylene heat-shrinkage film of a kind of low thickness the most according to claim 1, it is characterised in that: the raw material of described outer layer It is the metallocene PE of 3:2:2, Low Density Polyethylene and high density polyethylene (HDPE) including mass ratio；The raw material bag in described intermediate layer Including mass ratio is the metallocene PE of 8:2:2.5, Low Density Polyethylene and high density polyethylene (HDPE)；The raw material of described internal layer includes Mass ratio is the metallocene PE of 5:2:1, Low Density Polyethylene and high density polyethylene (HDPE).
The polyethylene heat-shrinkage film of a kind of low thickness the most according to claim 1, it is characterised in that: the raw material of described outer layer It is the metallocene PE of 4.5:2.5:2, Low Density Polyethylene and high density polyethylene (HDPE) including mass ratio；Described intermediate layer former Material includes that mass ratio is the metallocene PE of 8:2:3, Low Density Polyethylene and high density polyethylene (HDPE)；The raw material bag of described internal layer Including mass ratio is the metallocene PE of 6:2:1, Low Density Polyethylene and high density polyethylene (HDPE).
The polyethylene heat-shrinkage film of a kind of low thickness the most according to claim 1, it is characterised in that: the raw material of described outer layer It is the metallocene PE of 5:3:2, Low Density Polyethylene and high density polyethylene (HDPE) including mass ratio；The raw material bag in described intermediate layer Including mass ratio is the metallocene PE of 8:1:3, Low Density Polyethylene and high density polyethylene (HDPE)；The raw material of described internal layer includes matter Amount is than metallocene PE, Low Density Polyethylene and the high density polyethylene (HDPE) for 5:2:1.
6. according to the polyethylene heat-shrinkage film of a kind of low thickness described in claim 1 ~ 5 any one, it is characterised in that: its system Preparation Method is to be extruded by three-layer co-extruded equipment after each layer raw material mixing and stirring；The extrusion spiral shell of described three-layer co-extruded equipment The draw ratio of bar is 32:1 ~ 36:1.
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CN105459549B (en) * 2015-12-29 2018-05-04 东莞市正新包装制品有限公司 A kind of PE heat shrink films
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CN110181911A (en) * 2019-06-27 2019-08-30 常州工程职业技术学院 A kind of multi-layer co-extruded polyethylene torsion film of simple tension
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CN111469519B (en) * 2020-04-07 2022-04-08 上海冠宝塑胶有限公司 High-transmittance PE (polyethylene) heat shrinkable film and preparation process thereof
CN112895647B (en) * 2021-02-07 2023-03-21 黄山永新股份有限公司 Uniaxially stretched polyethylene resin film and preparation method thereof
CN117246018B (en) * 2023-10-25 2024-04-12 沧州市鑫峰塑料有限公司 PE heat-shrinkable film and preparation method thereof
CN117567809A (en) * 2024-01-16 2024-02-20 新疆独山子石油化工有限公司 Metallocene polyethylene heat-shrinkable film, and composition and preparation method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2479738A1 (en) * 2003-09-24 2005-03-24 Exxonmobil Chemical Patents Inc. Collation shrink
CN102173160B (en) * 2010-12-29 2013-07-17 东莞市正新包装制品有限公司 Heavy-duty thermal shrinkage polyethylene film and preparation method thereof

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